.. py:function:: arrow( pos=vec(0,0,0), axis=vec(1,0,0), color=color.orange )

   :param pos: Position of tail. Default <0,0,0>.
   :type pos: vector
   :param axis: Extends from tail to tip. Default <1,0,0>.
   :type axis: vector
   :param color: Default is *color.white*
   :type color: vector
   :param round: Makes shaft and head round instead of square. Default is *False*.
   :type round: boolean
   :param shaftwidth: Width of tail. Default 0.1*(length of arrow)
   :type shaftwidth: scalar
   :param headwidth:  Default 2*shaftwidth
   :type headwidth: scalar
   :param headlength: Default 3*shaftwidth
   :type headlength: scalar

If you don't set shaftwidth, shorter arrows will be smaller in all dimensions than longer arrows (first image below). By setting shaftwidth you can ensure that all arrows will have the same cross sectional area (second image below).

Note that, if you do set shaftwidth, the headlength of extremely short arrows may need to be adjusted.

Attributes used less often:

.. py:function:: arrow( opacity=0.5, shininess=0.2, texture=textures.wood, make_trail=True, canvas=mycanvas, emissive=False )
   :noindex:

   :param opacity:  Default 1.0; Range 0-1.
   :type opacity: scalar
   :param shininess: Default 0.6; Range 0-1.
   :type shininess: scalar
   :param emissive: Default False. Object glows, losing all shading, if True.
   :type emissive: boolean
   :param texture: Default None.
   :type texture: class element or path
   :param visible: If False, object is not displayed.  Default: True
   :type visible: boolean
   :param canvas:  Default is :py:attr:`scene`.
   :type canvas: object
   :param make_trail: If True, object leaves a trail when moved.
   :type make_trail: boolean
   :param up: A vector perpendicular to the axis.
   :type up: vector
   :param group: The group to which this object belongs.
   :type group: object